-5x^2+10+20=0

Solution for -5x^2+10+20=0 equation:

Simplifying
-5x2 + 10 + 20 = 0

Reorder the terms:
10 + 20 + -5x2 = 0

Combine like terms: 10 + 20 = 30
30 + -5x2 = 0

Solving
30 + -5x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-30' to each side of the equation.
30 + -30 + -5x2 = 0 + -30

Combine like terms: 30 + -30 = 0
0 + -5x2 = 0 + -30
-5x2 = 0 + -30

Combine like terms: 0 + -30 = -30
-5x2 = -30

Divide each side by '-5'.
x2 = 6

Simplifying
x2 = 6

Take the square root of each side:
x = {-2.449489743, 2.449489743}